CM NEC Input File Helix for 2442 MHz, Pow 20020702 |
CM All data in meters                              |
CM I tried surface patch as reflector:             |
CM   SP 0 0 .0 .0 -H 90 .0 Sr                      |
CM It doesn't work. Gives far too optimistic gain. |
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CE
SY  W=.001    ' Wire radius (2mm dia copper wire)
SY  R=.02175  ' Helix radius (PVC sewer pipe 40mm dia + wire isolation)
SY  S=.020    ' Spacing between turns
SY  N=4       ' Number of turns
SY  H=.003    ' Helix height above reflector
SY Rr=.07     ' Reflector radius
SY Sr=Rr*Rr*3.14
SY  L=S*N
SY Rn=5
SY Rd=Rr/Rn
SY Rx=Rr-Rd
GW 0 1 -Rr -Rr -H -Rr -Rx -H W
GW 0 1 -Rr -Rr -H -Rx -Rr -H W
GM 0 Rn*2-1 0. 0. 0. 0. Rd 0.
GW 0 1 -Rr Rr -H -Rx Rr -H W
GM 0 Rn*2-1 0. 0. 0. Rd 0. 0.
GW 0 Rn*2 Rr Rr -H Rr -Rr -H W
GH 1 200 S L R R R R W
GE 0
FR 0 1 0 0 2442. 0
EX 0 1 1 0 1. 0
RP 0 73 73 1001 -90. 90. 5. 5. 10000.
EN